Quercus robur 'CONCORDIA'

Quercus robur
Quercus robur 'CONCORDIA'
English oak
SIZE/TYPE medium-sized tree
LEAVES deciduous broadleaf
FLOWERS insignificant or non-blooming
LOCATION full sun
USDA zone (lowest) 4   (down to -34°C)
FOR ZONE 5+6 Code of winter protection zone 5+6
FOR ZONE 7 Code of winter protection zone 7
BELONGS TO CATEGORIES Deciduous broadleaf
náhled foto
Oaks are common trees of our natural woodlands. They border our ponds, occur naturally in our mixed forests, and make magnificent specimen trees in our parks and arboretums where less common species or rare varieties can be seen.

Concordia is an English oak variety raised in Belgian nursery Van Geert in 1843. It is truly a sensation among oaks as it has very attractive foliage of golden yellow colour in spring and yellow to fresh yellow-green in summer. The leaves are shallowly lobed and appear clustered along the branch tips. The tree often makes another portion of new foliage at the end of summer. The leaves, though being bright yellow are not prone to sunscorch as some other trees and shrubs with yellow foliage. Quite the contrary – this oak must be grown in full sun.

Concordia grows slowly to moderately about 10m tall when 20-25 years old. It makes a narrowly pyramidal crown when young changing to widely rounded with age. It can take any type of pruning to achieve a desired shape or to control its size.

Oaks are not fussy about soil type, they can take anything from slightly alkaline to slightly acidic conditions. They do well in well-drained soil, moist is good but boggy is fatal. Once established they withstand drought and city pollution. Newly planted trees need to be staked for 2-3 years to establish. Fully hardy to -34°C (USDA zone 4).

Last update 21-04-2010
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Quercus robur 'CONCORDIA' girth 6-8 cm

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Quercus rubra
  • STANDARD QUALITY - Plants of this group are 1st class quality with number of branches and overall density adequate to their size and age, considering they were container grown.
  • DE LUXE QUALITY - This label guarantees a luxurious quality of manually selected plants that, compared to their height and age, are exceptionally dense and beautiful.
  • EXTRA - These plants are usually mature and bigger specimens with exceptional overall appearance.
  • STANDARD (as described in the plant form) means a tree with a trunk of 190-210 cm and a crown at the top, unless specified differently. The commercial size for trees is their girth measured in the height of 1m from ground.
  • HOBBY - These plants are of the same quality as our standard-quality plants but younger and therefore cheaper.
  • SHRUB - a woody plant with branches growing bushy from the ground level.
  • HALF-STANDARD or MINI-STANDARD - a small tree with shorter trunk, its size is usually specified.
  • FEATHERED - These are trees with branches growing already from the base of the trunk and up along the stem.
  • GRASSES and PERENNIALS - Sizes given usually read the diameter of the pot or the clump, as specified.
LARGE PLANTS over 150 cmspecimens, screening and hedging shrubs

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